<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

defined('THINK_PATH') or exit();
/**
 * 系统行为扩展：模板内容输出替换
 * @category   Think
 * @package  Think
 * @subpackage  Behavior
 * @author   liu21st <liu21st@gmail.com>
 */
class ContentReplaceBehavior extends Behavior {
	// 行为参数定义
	protected $options   =  array(
        'TMPL_PARSE_STRING' =>  array(),
	);

	// 行为扩展的执行入口必须是run
	public function run(&$content){
		$content = $this->templateContentReplace($content);
	}

	/**
	 * 模板内容替换
	 * @access protected
	 * @param string $content 模板内容
	 * @return string
	 */
	protected function templateContentReplace($content) {
		// 系统默认的特殊变量替换
		$replace =  array(
            '__TMPL__'      =>  APP_TMPL_PATH,  // 项目模板目录
            '__ROOT__'      =>  __ROOT__,       // 当前网站地址
            '__APP__'       =>  __APP__,        // 当前项目地址
            '__GROUP__'     =>  defined('GROUP_NAME')?__GROUP__:__APP__,
            '__ACTION__'    =>  __ACTION__,     // 当前操作地址
            '__SELF__'      =>  __SELF__,       // 当前页面地址
            '__URL__'       =>  __URL__,
            '../Public'     =>  APP_TMPL_PATH.'Public',// 项目公共模板目录
            '__PUBLIC__'    =>  __ROOT__.'/Public',// 站点公共目录
		);
		// 允许用户自定义模板的字符串替换
		if(is_array(C('TMPL_PARSE_STRING')) )
		$replace =  array_merge($replace,C('TMPL_PARSE_STRING'));
		$content = str_replace(array_keys($replace),array_values($replace),$content);
		return $content;
	}

}